[xiph-rtp] Theora RTP payload format
stevek at stevek.com
Mon Apr 18 15:04:01 PDT 2005
Ralph Giles wrote:
>On Mon, Apr 18, 2005 at 05:26:31PM -0400, Steve Kann wrote:
>>That sounds interesting.. I do plan to experiment with some of the
>>experimental work out there; The theora-mmx branch looks interesting,
>>because presently performance is really just barely adequate for
>>real-time conferencing. Of the other open-source (but not patent-free)
>>encoders out there, it seems that ffmpeg (for any of it's mpeg/h263
>>variants) and x264 really blow theora away at the moment.
>Yeah, you really need the -mmx branch for conferencing. There are some
>decoder asm patches available as well, and I've been working on a
>parallel version recent for the Elphel people.
>The ffmpeg and vxid implementations have seen a lot more optimization
>work than theora has. We're getting there, but working on encumbered
>codecs seems to be sexier...
Maybe. I've been working with Speex for some time, so I'll help where I
can -- but in the asterisk community, people are enamored with iLBC
(free, but not open-source), and G.72x (patents and licenses and all).
I'll also need to do optimization work for PPC, because my application
needs to be able to perform well on PPC as well as x86.
I'm sure there's headroom there to make things work, so it's not my
primary concern.. The quality I see so far with this seems acceptable,
but x264 seems to be still better..
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